Improvement in sash-locksf



f `I.;HOLLINGswoRTH.4

jsAsH LOCK.

Patented Feb. 6, 1866,

UNITED STATES vPrrIENr OFFICE. I

lJAMES HoLLINGSWoRrH, or GHICAGQ, ILLINOIS, .Lts-SIGNORy To o'. M. HEN-nIInSoIv, or SAME IJLAGE.

liimenoviamENT IN sAsH-LocKs'. .Y

specification forming part of Letters Patent No. 52,4192. lated Februarye, i866.

To all rwhom 'it may concern:

Be it known thatI, J AMES lloLLINorsvvolearnJL of Chicago, in the'county ot' Cook, and State i" of Illinois, haveinvented a new andImproved Sash-Lock; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, making a partot' this specica- ,Gis a side viewof one of the lockingjaws.

Fig. 7 shows the operation of the jaws.

Similar letters of reference indicatec'orresponding parts Ain theseveral figures.

This invention relates toan improvement on sash-locks which operate uponthe principle of eccentric jaws by binding' against the window-strip forsustaining thewindow-sash at any desired elevation, and for locking thesash when down, so that itcannotbe lifted from the outside.

The-,invention consists'in constructing such devices in such manner thatthe parts of which they are composed can be made and put together muchcheaper than hitherto, and so that said parts may be secured togetherand the loch rigidly fixedl to the sash by a single fastening, 'as willbe hereinafter described.

To enable others Skilled in the art to understand my invention, I willdescribe its construction and operation. In the accompanying drawings, Arepresents a circular plate having` an annular rim,

a, projecting from its'edge, so as to form a shallow cup, as clearlyshown in Figs. 3 and `5. 1n forming this cup A a stud, b, is left uponits upper suri'ace'upon one side of its center,

4whichstud may have a hole throughit to receive a screw, c, oraprojection of less diameter than this stud maybe formed upon its end toServe as'a rivet, as will be hereinafter further mentioned. f

0n the opposite or `tlat 'side'ofl the cup A three cylindrical pins, c ee, are formed for assisting in holding this plate rigidly in it'splace.tohold these when applied to a window-sash, aslshown in v Fig. 7. B Bfare the'locking-jaws, which areconstructed with eccentric enlargementson one ot' their ends and curved 1in ger-levers on their opposite ends.Around the axis ot' :notion of these jaws semicircnlar enlargements areformed, which arc'recessed and lapped to getherin such manner that thejaws will lie 'a-t upon the edge ofthe rim ct when they are confinedupon the end ot the stud l) bythe screw -c and its washer c. stud b issuch that the upper portion of it serves as the .pivot ot the two jaws7BI5', and .when these jaws are applied to it the screwand washer abovementioned will serve jaws thereon without causing' them to work -hard orallowing them to move too-loosely.4 When the screw o is used it alsoserves to secure the sash-lock t a window- Sash, while the projections cat the bach of plate A, which are let into the sash, serve to preventthis lock-plate from moving-'when se cured to the sash. When the screw cis dispensed with and the locking-jaws are held in place by a rivet, asabove mentioned, the locklplate A may be secured by one or more screwspassing through it at any suitable point or.

points.

The rim a, around the edge ot' the lochplate A, forms a space betweenthe jaws B B" and the surface of this plate for receiving a coiled'-spring, g, which passes around the Stud b. The ends of this springproject out and act upon two pins. It lr, which project from the flatsides ot' the jaws B B, as shown clearly in Figs. l, 2, and 3, so as toforce the two eccentric binding ends of Said jaws toward each other, asshown in Fig. l. By taking hold of `the curved handles,'ot' these jawsBB and withthe thumb and finger pressing'thcin'to gether the bindingends 'will bei'orced apart, as Shown'in Figs. 2 and?. When 'the jaws arereleased the spring g willy close their bindingends again. lhe bindingends ot' the jaws B B are constructed with segments j j uponV them, theaxes of which are eccentric to the axis of motion ot' their jaws. Thesesegments may be made very wide, as shown in Fig. 6,

so as to present a good binding-surface. It

desirable, these surfaces may be serrated, so

The length' of the I that they will not be liable to slip in the act ot'pressing against-thc surface ot' the window-strip. 'lhcse binding` endsjj project beyond the circumference ot' the plate A :t short distance,and enable u person to adjust the lock-plate in such it relation to thewindow-strip that the jaws B B will be in lproper position after suchadjustment to uct upon this strip for holding the windowsush either downor up. This is effected by making,r the cup-shaped lock-plate A of suchdialneter with rela-tion to the jaws j j that this plate caube s'et soas to nearly touch the window-frame or strip thereof, iu which positionlconjunction with the rim a, as stops for preventing thejaws fromopening too wideor turningr on their stud b so as to get out place. Thisis brought about by hen-*iig` the pin or studb arranged out of' thecenter ofthe cupplate A.

Itwill be seen from the above description that I am'enabled to constructevery part of the sash-lool; so that it will not require finishing orfitting.

The cup-shaped plate A may be made circular, rectangular, elliptical, orof any other shape without departing from the principles of myinvention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is i v 1. The application of the -jews B B toa. plate, A, having a- 4projecting rim, a, for the purpose of forming,`ai space `between the surface of said plete and the jews to receive thepins li It and spring g, substantially as described. ,Y

2. The s tud b, in combination with the cupshaped plate A and jews B B',substantially as described.

' AMES HoLLlNesv-voBTH.

Witnesses PHLLIP CROWLEY, R.. WooLFoRD.

